Physical Sciences and Mathematics Commons^™

A Green Bank Telescope Survey For H I 21 Cm Absorption In The Disks And Halos Of Low-Redshift Galaxies*, S Borthakur, Tm Tripp, Min Yun, Dv Bowen, Jd Meiring, Dg York, E Momjian

Astronomy Department Faculty Publication Series

We present an H I 21 cm absorption survey with the Green Bank Telescope (GBT) of galaxy-quasar pairs selected by combining galaxy data from the Sloan Digital Sky Survey (SDSS) and radio sources from the Faint Images of the Radio Sky at Twenty-Centimeters (FIRST) survey. Our sample consists of 23 sight lines through 15 low-redshift foreground galaxy-background quasar pairs with impact parameters ranging from 1.7 kpc up to 86.7 kpc. We detected one absorber in the GBT survey from the foreground dwarf galaxy, GQ1042+0747, at an impact parameter of 1.7 kpc and another possible absorber in our follow-up Very Large …